I still can't get markdown syntax highlighting to work. Using Monokai or any other theme. Tried it on .markdown and .md files. I also tried installing the Markdown Build package using the Package Manager but that didn't help at all.

I have the same issue (for Sublime 2.0.2, on Mac OS X), and i fix it : - use a good Color scheme (Cobalt for example)- verify in Preferences > Package settings > Markdown preview > Settings - Default, that "enable_highlight" is set to true